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- adb drivers are installed, in a device manager there shouldn't be unknown devices at connection of switched-on phone. ADB Drivers here ADB_usb_driver_120827_v3.7z
- USB debugging in Developer options of System setting is allowed

The Following 4 Users Say Thank You to Umesh_Arora For This Useful Post:

[GUIDE] How to ReadBack ROM using SP FlashTool, to make the CWM recovery, to install SuperUser (get root) etc..
If your phone not rooted using the ROOT button.

1. Make scatter by means of MTKDroidTools
Scatter is the text file with ad******* of the blocks, necessary for the SP FlashTool program.After creation of scatter don't close the main window of the program! Otherwise once again it is necessary to turn on phone.

2. In SP FlashTool choose this scatter and go on the Read Back tab.

3. Choose path and a ROM file name
Click on Add button. Double click of a mouse on the appeared line. Choose a file name, the name has to begin with ROM_ as offers FlashTool! Remember path and the name of ROM_ file.

4. Determine the ROM
Type has to stand in HEX. In the field of Start Address it is necessary to write down 0x000000. In the field of Length we copy from scatter the address of the block following after RECOVERY or the address of other block for fuller backup. For phones with type of the blocks EXT4 it is the cache block address. The number in the Hex format has to begin with 0x

5 . Choose Read Page Only on yaffs2 type blocks phones
In FlashTool choose Read Page Only in the field of Read Method. If this field isn't present, the window with this question can emerge, too we choose Page Only. On phones with EXT4 blocks it doesn't get out (as a rule).

6. Read Back ROM_
Click on Read Back button and connect the switched-off phone to PC. Here the options depending on a concrete phone are possible. Maybe it is necessary to press at the same time with connect of a cable the camera or volume buttons. Experiment and study work with FlashTool in threads with similar phones! On some MT6573 models, for example on B63, it can't be executed with any combinations and only testpoint need!

7. Prepare files for FlashTool and make CWM
If everything passed without errorss, we open the MTK Droid Root & Tools window which we left on 1th step. If for some reason the window isn't present, it is necessary to turn on phone and to connect it to the program. Click on To process file ROM_ from FlashTool button and choose the ROM_* file saved on the 6th step. At successful unpacking rom it will be offered to choose CWM from similar phone. Chosen CWM it is checked on compliance to the connected phone and if ok, the CWM is created. Starting with v2.4.0 CWM it is made automatically and the file from similar phone shouldn't be looked for any more!

8. Download new CWM to the phone
Start FlashTool, choose scatter in the folder created on the 7th step. Remove marks from all blocks! Click on RECOVERY and we choose the file CWM in the same folder which was created on the 7th step. Click Download and connect a cable to PC (phone has to be switched off) and expect the end of process. DANGEROUS! On this step the CWM recovery block has to be marked only! Also it is necessary to use only the Download button and not to use at all the Firmware Upgrade button!

Never needlessly Download preloader and DSP_BL blocks! It is always dangerous! On some models of phones (for example Alcatel) you will have a brick even if you download these blocks read from phone which you own! Always remove from them marks in SPFT!

Br
Umesh Gaba

The Following User Says Thank You to Umesh_Arora For This Useful Post:

In case of problems in operation with SPFT it is useful to listen to a sound on PC and to open a Device Manager. The sound signals about connection and switch-off of devices and the Device Manager shows a mode of the virtual port and information on drivers. If with drivers everything is all right, devices appear in the section Ports (COM & LPT) and the icon of the device shan't be marked by exclamation point ! in a yellow surrounding.

Modes of the VCOM:
BOOTROM (in device manager show as MTK USB Port with pid=003) . For connection in this mode can it is required :
to use press of some phone buttons (photo, volume up or down ) at the same time with connection of a cable to PC (phone shall be switched off)
or to use OTG adapter
or, if it didn't turn out 1 and 2, use a test point.
PRELOADER (...MediaTek USB VCOM Port with pid=2000 ) This port appears for only some seconds in case of connection of switched-off phone to PC
DA_HIGHSPEED (...MediaTek DA USB VCOM Port with pid=2001)This port can appear after phone at first will be connected in the PRELOADER or BOOTROM mode.

How to swith off DA Download All mode

Sometimes DA Download All mode switching off helps not to have errors with MTD type a flash. In the last FT versions it can't be made of the menu, it is necessary to change the platform.xml file. It is necessary to change in section of your platform usb_download_support and da_dl_all_support keys with "true" to "false"

After these changes it is necessary to connect a cable to PC, having waited the ends of counting.

ERRORS:

(2005) S_BROM_CMD_STARTCMD_FAILoften there is on phones with MTD type a flash.
During Downloading preloader or dsp_bl aren't marked. To use the suitable version of SPFT or to switch off the DA download All mode.
During Downloading preloader or dsp_bl are marked. Not mark these blocks! Or connect phone in the BOOTROM mode if it is necessary to Download them.
During reading, formatting or ROM-RAM testing. Сonnect phone in the BOOTROM mode.

BR
Umesh Gaba

The Following User Says Thank You to Umesh_Arora For This Useful Post:

Flashing the whole ROM
First of all open SP Flash Tool, then click Scatter-loading button to load the correct scatter file
(MT6575_Android_scatter_emmc.txt or MT6577_Android_scatter_emmc.txt, depending on which phone you have) for your device and ignore any message that may appear.

Turn off your phone, remove the battery and replace it after some seconds (and don't turn on the phone).
Press F9 (or hit Download button) and connect your phone into the computer via USB data cable.
The process will start and a red progress bar will appear.

Right after the purple progress bar is complete, a message will appear underneath it:
“Please insert USB cable in x seconds” and then the download will start right away (you will see the yellow progress bar filling up).

When the yellow bar is complete, you'll get a popup with a green circle and Download OK message,
which means that the process has been successfully terminated.

You can now safely disconnect your phone and turn it on. The process ends here.Flashing only part of the ROM
In case you want to flash just one part of the ROM, that is also possible. In the shown example, only recovery image will be flashed.
Deselect all parts except the one(s) you want to flash and then press F9 (or hit Download button).

Please note that, even though it isn't mandatory to select it on the list of images to flash,
preloader file must be present in the same folder as the other partition(s) that you want to flash, or else phone will not be able to enter into download mode.

Attention: Please follow the instructions carefully. I will not take any responsibility on whatever may happen with your phone.

Very important warning: Always make sure that you trust the sources of the ROM you download and know that it is meant for your phone.
After flashing a wrong preloader, your phone will be completely dead (can't be powered on, it will not charge and won't be detected anymore by the computer) and there is no way to recover it.

Thanks bro,
I have problem with my phone. It's GT-I9100 (copy 100% of S2) CPU MT6577 and I bricked it.
I backup rom ( use gscript) from other same phone and create scatter file (mtk studio) and flash it with sp flash tool.
And now, my phone can power on but it not have imei and baseband damaged.
I think it not be flash dsp_bl.img but i can not flash it because it not be auto load with scatter file.